Flight number record

DL 1337

Delta Air Lines · Orlando to Raleigh

Route: MCO → RDU
Departs: 08:48
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1337, check with Delta Air Lines.

DL 1337 earns an A−. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 365 flights, with a median arrival 15 minutes early.

Set against the rest of the country, DL 1337's record is 10 points better than the US average of 77.6%. That gap is worth roughly 96 fewer late arrivals for every thousand flights.

On time

87.2%

Arrivals under 15 minutes late, of 352 completed flights

Avg delay

76 min

Across delayed arrivals only, not all flights

Cancelled

3.56%

National rate is 1.81%

1 hour+ late

4.3%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 15 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When DL 1337 flies

DL 1337 flies MCO to RDU without a single fixed slot. Its most common scheduled departure was 08:48, used on 66 of 365 flights, with 08:55 (65 flights) and 09:58 (62 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:4866 flights18.1%
Departs 08:5565 flights17.8%
Departs 09:5862 flights17.0%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 08:48 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1337 runs 3 points better at 87.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1337 next to MCO to RDU

Every carrier on MCO to RDU combined arrived on time 76.8% of the time across 2,702 flights, so DL 1337 is 10 points ahead of it. Delta flew 1,005 flights on the same city pair under all its flight numbers, including this one, and those ran 79.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 6 points.

DL 1337 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1337	365	87.2%	76 min	3.56%	A−
All Delta Air Lines on MCO–RDU	1,005	79.3%	92 min	2.39%	B
All carriers on MCO–RDU	2,702	76.8%	77 min	1.78%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1337 quarter by quarter

DL 1337 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.1% on time and its weakest Jan–Mar 2026 at 76.1%, a swing of 16 points on roughly 91 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202592 flights89.8%
Oct–Dec 202592 flights90.8%
Jan–Mar 202690 flights76.1%
Apr–Jun 202691 flights92.1%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1337 did best on Saturday at 94.0% on time and worst on Monday at 75.5%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1337 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 58% of the 3,409 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
58%
Carrier
25%
Extreme weather
9%
National Airspace System
9%

58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,409 reported delay minutes here, that single category outweighs weather by 6 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,409 delay minutes reported on DL 1337.

Cancellations run at 3.56%, against 1.81% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.3% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 534 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

DL 1337 is not only a MCO to RDU flight. It also flew RDU to MCO (365 flights, 91.1% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 365 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

Other routes flown as DL 1337
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
RDU to MCO	365	91.1%	74 min	4.11%	A−

What to do with this

Booking DL 1337

For a booking, the cancellation rate is the figure to plan around on DL 1337: 3.56% of its 365 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures